Valve



N TE STATES:

:PA NT OFFICE.

V CHARLES E. CRO-MME'IT, {or CHELSEA, MASSACHUSETTS.

VALVE.-

Specification of LettersPatentI P t nte t 21, 1 2

Application filed July 25', 1916. Serial No. 111,283.

The specific illustrative embodiment of my invention here shown and described is a valve suitable for use as an outlet for gas or fluid held under pressure, and is an improvement upon the type of valve shown and described in my application, Serial No.

100,121, filed'May 26, 1916. I

In the drawings Figure 1 is a side elevation showing the valve protector and indicating the general posltion of the valve;

Fig. 2 is a cross section taken on the line 22 of Fig. 1; and

Figs. 3 and 1 show modifications.

One of the objects of my invention'is to provide a valve whereby the entrance of atmospheric air into a gas container may be prevented and the exhausted container upon being returned to its filling station may be immediately refilled without the necessity of being first pumped out to empty it of air which'without the use of such a device as mine would" have passed 1nto-1t'following the exhaustion of the/gas or fluid it originally contained. A further object of the present embodiment of my invention is so to construct said valve that the user cannot tamper with or prevent its operation.

I have shown the main valve body 1 screwed into thetop of a gas or fluid-conv tainer 2 and covered by a protecting cap 3 arranged to screw upon the neck 4: and provided at the top with. easily removable.

Upon the top of the valve body is screwed the usual nut 6 for retaining the packing 7. Through the center of the nut 6 fits the valve shank 8 which is provided at its upper end witha squared portion 9 to permit its being turned by a wrench. The upper part of the valve shank 8 is smooth, but near its lower end it is provided with threads which fit corresponding threads in the bore of the valve body. Below the threads the valve shank is tapered as at 10 to make a F. CROM- be non-rotatable relatively thereto.

a nut 5 to make it tight closure against the shoulder 11in thevalve bore. I

Y The lower end of the valve shank 8' is f bored and threaded to receivethe threadedeXtension of the plug 12,- said extension being threaded oppositely to the threads upon the, exterior of the valve shank 8'. The plug 12 has projecting from its lower end the squared'portion 13 which engages a similarly shaped opening 14: in the insert.

15 which so fits into the valve body 1 as to manner the plug 12 is prevented from'rotating, but upon the turning of the'valve I shank 8 it will" advance or recede in'accordance respectively with the downward and upward movement of the main valve shank 8. The main outlet nozzle of the valve projects laterally from the side of the valve body 1 and is indicated at 16. In this nozzle is slidably located the ring 1-? which is normally kept in its outermost position by the spring 18. Conically'shape'd tofit the openlng of the ring 17 is the plunger 19 which is slidably mounted in the plug 20 In this and normally kept in close fitting contact with said opening by-means of the spring 21 which abuts against the'lockin g plug 22.

Through the locking plug 22 and the plug 20 may be bored vents 23 to permit the as 'egre'ssof the gaswhich when the main valves 8 and 12 are open flows from the container 2 throughthe tube 24: andbypass 25 past conical portions 10 and 12 of the mainvalve mechanism, through the tube 26 and central opening of the ring 17, depressing the spring-pressedplug 19 and flowing on and out through the tubes 23. The pressure of the spring 21 may be at approximately 2 lbs. (or any other desired pressure) so that it will be impossible for thepressure of the gas within the container.

to be reduced below the pressure of said spring, which will return the plug 19 to its seat when that pressure is reached and pre vent any atmospheric air entering the container.

In Figs. -3 and 4: I have shown modifications of my valve. In Fig. 3 the main valve is headed as shown at 27, said head being pocketed within the shank 8 in such a way. that the rotation of said shank will lift the valve away from its seat.

As a continuation of the main valve a sleeve 28 is provided within which is a spring 29 which is adapted to press the plug 30 into the upper end of the aperture of the tube 31 at any desired pressure (say 2 lbs), thus preventing any atmosphericair from entering the container after the gas has been reduced 'to that pressure. A by-pass 32 is provided and within it the spring- Inusing thismodification the gas, when the main valve mechanism has been opened,

escapes through the tube 2% and lifting the plug 30 passes around it and out through the tube 3": until the pressure is reduced to a point equal to the strength of the spring 29 whereupon the plug 30 advances and prevents further gas escape. In refilling the container the gas is forced in through the tube 34: past the sleeve 28 into the by-pass 32, and forcing back the plug 33 passes into the container through the lower end of the by-pass 82. v V

In Fig. 4 the principle of operation is very similar to that of the construction shown in Fig. 2, the main valve apparatus be ng constructed, however, like that shown 1n Fig. 3, except that a conical seat 35' is provided upon which the lower end of thevalve seats.

In Figs 2 and 4 the collar 17 is prevented from moving out of its socket by the ring36.

In using the ordinary valve attached to containers holding gas or fluid under pressure, the user can permit the tank to become empty until itsinterior pressure is equal to the pressure of'the atmosphere outside, with the result that air leaks into the tank through the valveopening. This results in the necessity for pumping out of the used containers before refilling them, the mixture of gas or fluid and air still remaining therein. This entails not only a'waste of gas or fluid but also a considerable waste of time and power. By using my device, however, such waste is obviated.

. WVhile I have described several specific embodiments of my invention I do not wish to be limited to the particular construction shown nor to the particular use designated, and many modifications of my invention may obviously be resorted to without departing from the spirit or scope thereof.

I claim;

1. In combination with a container for compressed gases, a main valve manually operable to openand close a passage between the interior of the container and the 2. In a'gas or fluid-controlling valve, main valve means and auxiliary valve means comprising an auxiliary valve and a seat therefor, said valve and seat being resiliently pressed together, one being movable-in one direction by pressure in one direction and the other being movable in the opposite direction by pressure in another direction, and

limiting means opposing movement of both said valve and seat beyond predetermined points, whereby either pressure-actuated movement of said valve or pressure-actuated movement otsaid seat may effect separation of valve and seat.

In testimony whereof I have signedmy 1 name to this specification.

CHARLES F. oRoMMiiTr. 

